Acquisitions, Dispositions and Plant Closures Plant Closures (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring		$ 3	$ 1	$ 3	$ 3
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		(2)	$ (2)	(2)	$ (3)
Restructuring and Related Cost, Expected Cost		16		$ 16
Ocotlán, Mexico [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	[1]	1
Restructuring and Related Cost, Accelerated Depreciation		3
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		(1)
Plant Shutdown Costs		$ 5

[1] Included in Other (charges) gains, net in the unaudited interim consolidated statement of operations.